EVPN multi-homing port-active load-balancing
draft-brissette-bess-evpn-mh-pa-04

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Last updated 2019-10-31
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BESS Working Group                                     Patrice Brissette
INTERNET-DRAFT                                               Ali Sajassi
Intended Status: Proposed Standard                         Cisco Systems

                                                                 Bin Wen
                                                                 Comcast

                                                           Edward Leyton
                                                        Verizon Wireless

                                                           Jorge Rabadan
                                                                   Nokia

Expires: May 3, 2020                                    October 31, 2019

              EVPN multi-homing port-active load-balancing
                  draft-brissette-bess-evpn-mh-pa-04 

Abstract

   The Multi-Chassis Link Aggregation Group (MC-LAG) technology enables
   the establishment of a logical link-aggregation connection with a
   redundant group of independent nodes. The purpose of multi-chassis
   LAG is to provide a solution to achieve higher network availability,
   while providing different modes of sharing/balancing of traffic. EVPN
   standard defines EVPN based MC-LAG with single-active and all-active
   multi-homing load-balancing mode. The current draft expands on
   existing redundancy mechanisms supported by EVPN and introduces
   support of port-active load-balancing mode. In the current document,
   port-active load-balancing mode is also referred to as per interface
   active/standby.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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Patrice Brissette         Expires May 3, 2020                   [Page 1]
INTERNET DRAFT      draft-brissette-bess-evpn-mh-pa     October 31, 2019

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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  4
   2. Multi-Chassis Ethernet Bundles  . . . . . . . . . . . . . . . .  4
   3. Port-active load-balancing procedure  . . . . . . . . . . . . .  4
   4. Algorithm to elect per port-active PE . . . . . . . . . . . . .  5
     4.1 Capability Flag  . . . . . . . . . . . . . . . . . . . . . .  5
     4.2 Modulo-based Designated Forwarder Algorithm  . . . . . . . .  6
     4.3 HRW Algorithm  . . . . . . . . . . . . . . . . . . . . . . .  6
     4.4 Preferred-DF Algorithm . . . . . . . . . . . . . . . . . . .  6
   5. Convergence considerations  . . . . . . . . . . . . . . . . . .  6
   6. Applicability . . . . . . . . . . . . . . . . . . . . . . . . .  7
   7. Overall Advantages  . . . . . . . . . . . . . . . . . . . . . .  7
   8  Security Considerations . . . . . . . . . . . . . . . . . . . .  8
   9  IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  8
   10  References . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     10.1  Normative References . . . . . . . . . . . . . . . . . . .  8
     10.2  Informative References . . . . . . . . . . . . . . . . . .  8
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  9

 

Patrice Brissette         Expires May 3, 2020                   [Page 2]
INTERNET DRAFT      draft-brissette-bess-evpn-mh-pa     October 31, 2019

1  Introduction

   EVPN, as per [RFC7432], provides all-active per flow load balancing
   for multi-homing. It also defines single-active with service carving
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